How to change the screen font size? It is fine until I log in

Good morning, @newkirkacctg. 

I hope you're enjoying the day so far. 

To clarify, are you using the QuickBooks Online App or a web browser? If using a browser, you can press and hold the following keys to adjust the font size:

• Ctrl and + (zooms in)
• Ctrl and - (zooms out) 

Let me know if you have further questions or concerns. I'll be here to help you every step of the way. You can always reach out to us here in the Community anytime you need assistance. Take care!