If your units are higher rents and the tenants have assets, particularly RE you can file a lien in the courthouse with the Prothonatary.

I'm sorry to hear this.Contact a local attorney who handles L/T routinely for advice and do what they say.You can likely file an Unlawful Detainer to have her removed.But you might also try contacting her Housing Authority caseworker, posting a notice & attempting to meet with her in person and being extremely empathetic about what she's going through. 

Are you still able to claim student loans interest when filing taxes?

The person is often a family member, so they may have to inquire with the tax or legal advisor that helped file the estate returns. 

IL  OR  FLA  OH  others  MD  TX  and many others could give a rip unless of course someone files a complaint then your going to have to hire a lawyer to defend yourself. 

In a recent repair, the work order file uploaded had a filename with a different address in it.

When something breaks, you have to file a claim and wait for them to schedule one of their "approved" providers.

Are they sent in the mail immediately following an auction and being filed with the county?

Family member will file 1098 's with IRS

Then your choice is probably pay it and/or file a request to appeal to the Board of County Commissioners or whoever has the authority to waive.