We use both PayPal and Square. We know that we have to fill out the SAQ A-EP based on how we use PayPal. Based on the Square FAQs and some threads here, it seems that we wouldn't have to complete any SAQ if we were exclusively using Square (1 magstripe reader) so long as it's in accordance with terms of service.
Since we use both, are we subject to a different SAQ, like the SAQ D? How do we treat Square when completing the SAQ?
This thread my help you out.
https://www.sellercommunity.com/t5/General-Discussion/Understanding-PCI-Compliance/m-p/87880#M15627
Square Community