2019 tax return

I still don’t have my refund and it was submitted in January. How can i See if there are errors that is preventing my tax refund to be returned to me. I’ve used you for about 10 years and this has never happened to me. All that was new is that i changed my last name, which was legally done well before submitting my taxes. However, my maiden was still on my w-2s, but i filed with my married name.