What state are you in? Every state has different forms and rules. Exactly how is the blank 1040-SR line 5a "messing up" your state tax return? What specific form and line on your state tax return is wrong, and what is wrong with it?
As DoninGA said, if your pension is fully taxable, 1040-SR line 5a is supposed to be blank. It's very common for line 5a to be blank, so the state must have a way of handling it.
