Hi there,
Welcome to the Community. It's vital you know why the tax deductions changed so your books are in order.
To make sure you get the support you need with this, it's important I'm able to see what you're seeing on your screen. I recommend contacting our support team for further assistance using this link here. One of our specialists will be happy to assist you in a secure environment.
For the future reference, here's a helpful article related to PD7A's in QuickBooks Online:
How to access your PD7A
Let me know if you have other questions.