Get your taxes done using TurboTax

and sure enough this is what the tax bill states (page 1969 if anyone really cares)

 

 

‘‘(ii) DEADLINE.—
23 ‘‘(I) IN GENERAL.—Except as
24 provided in subclause (II), no refund
25 or credit shall be made or allowed
under this subsection after January
15, 2021.