The following is the instruction to compute the amount for Line 4a, PA Schedule G-L.
- The amount of tax assessed in NY can be calculated by taking the amount earned in PA and dividing it by the total amount of NY income. Then you can use this percentage times the tax liability in NY (Line 50, Form IT-203). This will give you the amount of tax that is assessed in NY that is attributable to the income that is taxed on PA as well.
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