You may need to.
According to Schedule A – Allocation of wage and salary income to New York State under the Instructions for Form IT-203-B in the Instructions for Form IT-203:
If any amount included on line 1 of Form IT-203 in the Federal amount column represents wage and salary income earned from work within New York State and outside of New York State while a nonresident, and that income does not depend directly on the volume of the business transacted (for example, hourly wages), you must complete Schedule A to compute the amount earned in New York State. For each job where such wages or salaries were earned both inside New York State and outside New York State, you must complete a separate Schedule A.
Please see the instructions for further information.
You may need to.
According to Schedule A – Allocation of wage and salary income to New York State under the Instructions for Form IT-203-B in the Instructions for Form IT-203:
If any amount included on line 1 of Form IT-203 in the Federal amount column represents wage and salary income earned from work within New York State and outside of New York State while a nonresident, and that income does not depend directly on the volume of the business transacted (for example, hourly wages), you must complete Schedule A to compute the amount earned in New York State. For each job where such wages or salaries were earned both inside New York State and outside New York State, you must complete a separate Schedule A.
Please see the instructions for further information.