That won’t happen anymore. If you don’t use the IRS Data Retrieval Tool, the college will ask for a tax transcript. They want proof that what you put on your FAFSA is true.
For some schools that use the CSS Profile, tax returns and other documentation are submitted using IDOC.
But only what you send is available to the colleges. If you didn’t send them 2019, they have no way to access that themselves. The IRS isn’t going to give them your 2019 tax return info…you have to do that.