while the IRS may have signed for it. it is a paper return. at one point in late 2020 the IRS said it had millions of paper returns to process - that means entering them into its computers. until then the IRS can't tell you that it has received it. the continuing pandemic, a new tax filing season coupled with Congress passing legislation late in 2020 that affected the tax laws has probably further slowed the processing of paper returns. Noone at this point can give you any info as to the date your 2016/2019 return will be processed
