Nedajú sa mi upravené fotky ukladať do formátu JPG.

Hi there,

Welcome to the Photoshop community. I'll help you figure this out.

What version of Photoshop & the operating system are you working on?

Does your Photoshop document have text, adjustments, masks, and filter layers?

A layered document will have limited formats when you use 'Save As.'

Use Save a copy or, for instance, File > Export > Export as.

Check this article to help save your documents in your choice format: https://community.adobe.com/t5/photoshop-ecosystem-discussions/quick-tips-learn-how-to-save-all-file-formats-from-photoshop-s-save-as-dialog/td-p/12933468

Let me know how it goes,

Thanks!
Sameer K