How would I go about looping an if statement back to a certain part of the program? I already have a do-while that works for another issue

The gross pay cannot be less than the withholdings. My goal is to set that back up where the "do" is

#include <iostream>
using namespace std;

int main ()
{
    double userChoice, employeeNumber, grossPay, stateTax, federalTax, ficaWithholdings,
    netPay, totalGrossPay, totalStateTax, totalFederalTax, totalFicaWithholdings, totalNetPay; //Declares variables
    cout<<"\t\tMENU\n"; //Menus screen
    cout<<"----------------------------------------------\n";
    cout<<"1) Payroll Report \n";
    cout<<"2) Salesbar Chart \n";
    cout<<"3) Quit\n";
    cout<<endl;
    cout<<"Enter choice: ";
    cin>>userChoice;
    cout<<endl;
    while(userChoice == 1) //Executing payroll report
    {


        cout<<"Enter the employee number (0 to quit): ";
        cin>>employeeNumber;
        if (employeeNumber == 0)
        {
            cout<<"Program terminated";
            return 0;
        }
        while(employeeNumber < 0)
        {
            cout<<"Error, number can't be negative. \n"; //input validation
            cout<<"Enter the employee number: ";
            cin>>employeeNumber;
            cout<<"\n";
        }
        //-------------------------------------------------
        do {
        cout<<"Enter the gross pay: $"; //Gets gross pay
        cin>>grossPay;
        while(grossPay < 0)
        {
            cout<<"Error, number can't be negative. \n"; //Input validation
            cout<<"Enter the gross pay: $";
            cin>>grossPay;
        }
        //------------------------------------------------
        cout<<"Enter the state tax: $";
        cin>>stateTax; //gets state tax
        while(stateTax < 0 || stateTax > grossPay) //Input Validation
        {
            cout<<"Error, number can't be negative, or greater than gross pay \n";
            cout<<"Enter the state tax: $";
            cin>>stateTax;
            //while(stateTax > grossPay)
            /*{
                cout<<"Error, number can't be greater than the gross pay. \n";
                cout<<"Enter the state tax: $";
                cin>>stateTax;
            }*/                                                                      //documented out because was causing errorsin code
        }
        //----------------------------------------------    
        cout<<"Enter the federal tax: $";
        cin>>federalTax; //gets federal tax
        while(federalTax < 0 || federalTax > grossPay) //Input valdation for federal tax
        {
            cout<<"Error, number can't be negative, or greater than gross pay \n";
            cout<<"Enter the federal tax: $";
            cin>>federalTax;
            /*while(federalTax > grossPay)
            {
                cout<<"Error, number can't be greater than the gross pay. \n";
                cout<<"Enter the federal tax: $";
                cin>>federalTax;
            }*/
        }
        //-----------------------------------------------
        cout<<"Enter the FICA witholdings: $";
        cin>>ficaWithholdings; //gets fica
        while(ficaWithholdings < 0 || ficaWithholdings > grossPay) //input validation for fica
        {
            cout<<"Error, number can't be negative, or greater than gross pay \n";
            cout<<"Enter the FICA Withholdings: $";
            cin>>ficaWithholdings;
            //while(ficaWithholdings > grossPay)
            /*
            {
                cout<<"Error, number can't be greater than gross pay. \n";
                cout<<"Enter the FICA Withholdings: $";
                cin>>ficaWithholdings;
            }*/
        }
        cout<<endl;
        //------------------------------------------------
        netPay = grossPay - (stateTax + ficaWithholdings + federalTax);
        **if ((stateTax + ficaWithholdings + federalTax) > grossPay) //Gross pay cannot be less than taxes combined
        {
            cout<<"Error, witholdings cannot exceed gross pay.\n"; //*******Where I'm having trouble******
            cout<<"Reenter data: \n";
            cout<<"Enter the employee number (0 to quit): ";
            cin>>employeeNumber;

        }**
        totalGrossPay = totalGrossPay + grossPay; //Calculations
        totalStateTax = totalStateTax + stateTax;
        totalFederalTax = totalFederalTax + federalTax;
        totalNetPay = totalNetPay + netPay;
        totalFicaWithholdings = totalFicaWithholdings + ficaWithholdings;
        cout<<"Enter the employee number (0 to quit): "; //Asks for employee number to loop again
        cin>>employeeNumber;        
        }

        while(employeeNumber > 1);      //end of do-while