Authority submission and acceptance
INCUMBENT CURRENTLY STRONGER
MeF, HMRC APIs and other authority systems own transmission, validation and acknowledgement.
Fair comparison · complementary architecture
Tax technology already does many things UD should not replace.
Compare PDF records, structured payloads, authority schemas, tax software, portals and records systems without caricaturing their strengths.
Tax calculation and preparation
INCUMBENT CURRENTLY STRONGER
Tax software implements tax logic, forms and jurisdiction workflows.
Machine-readable filing data
BOTH
XML and APIs are mature; UD can carry structured document content but does not replace authority schemas.
Portable exact final state
UD ADVANTAGE
UDS is designed for independently checkable retained bytes.
Amendment lineage
UD ADVANTAGE
UD keeps original and amended final states explicitly related.
Human-readable offline copy
UD ADVANTAGE
BrowserCarrier is readable offline without installation.
Authority integration
UD PLANNED
No IRS, HMRC or other tax-authority production integration or acceptance is claimed.
UD does not calculate tax, transmit e-files or secure filing acceptance.