Currently, TurboTax does not support Form 1040-SR.
Tax calculations for Form 1040 and 1040-SR are identical. See Everything to Know About the 1040-SR Form for Filing Seniors
Since these forms are virtually identical in function, the main reason to use Form 1040-SR is if you're filling out your tax return by hand rather than online. Form 1040-SR has larger type and larger boxes to write numbers in, making it slightly easier for seniors to read and fill out.
See IRS forms availability table for TurboTax individual (personal) tax products
