After you file

I just wish I can get a definite reason as what needs to be verified. I filed January 29th and I received the reference code 1541 on February 16th. I spoke to them 3 times since then including today and no one still doesn’t know the reason for my refund being held, but she did tell me I should be getting a letter in the mail early next week. Depending on what they’re holding my refund for will determine if I should wait 45-60 days.