Yes, you've got that address right. If you're mailing an amended tax return, from Texas, the complete and correct addressing of the envelope is exactly as follows:
Department of the Treasury
Internal Revenue Service
Austin, TX 73301-0052
You can verify that for yourself, independently of this answer and of TurboTax, by looking at the address chart on the Form 1040X instructions, Page 14 here:
https://www.irs.gov/pub/irs-pdf/i1040x.pdfWhile it may seem like a misprint or a mistake at first, that's actually an official mailing address. The post office does delivery there daily.
Although it may seem odd to most of us, these IRS processing centers are such huge buildings that they really merit their own ZIP codes. With your own ZIP code, you don't necessarily need a street number. Don't worry, your amended tax return will get delivered to the right place.
Finally, here are two (minor) bits of advice from a CPA who has been in the tax industry for a long time. One, when you mail your tax documents, do so from a staffed post office counter if you can, rather than dropping your envelope into an unstaffed mail box. It's typically somewhat safer, and will ensure that you've got the exact postage necessary. Second, be certain to use the full 9-digits of the ZIP code, instead of just 5-digits. That way your amended return will get delivered to the right IRS department in this huge complex, rather than just to the right building.
Thank you for asking this question.
