In Tax, when error INCDTLS.000011 is present in the Individual return:
Check Item 1 Salary and wages for amounts in Gross Payment where the Tax withheld is blank.
Provide a tax withheld amount when a gross payment exists.
If no tax was withheld, enter a zero figure (above Gross Payment).
If the error remains, check the tax withheld field where additional Salary and wage items are entered.