RETIRED PRODUCT • MICRO-TOOL DIRECTORY

QuarterLine is retired

Deterministic 2026 self-employment tax, Section 199A QBI deduction (statutory 20% rate), and safe-harbor estimated-payment calculator. Retired from active inventory following the Q3 2026 tax deadline window.

What that means

  • The calculator no longer renders here, and the tool cannot be purchased: a checkout request for it is rejected as retired rather than silently attributed to another product.
  • Its programmatic-SEO pages are withdrawn — every old /quarterline/calc/<slug> URL now permanently redirects to the directory.
  • Its agent tools (WebMCP) are no longer served or advertised; the published manifest lists only tools belonging to products in inventory.
Browse the live micro-toolsQuarterLine left the inventory; the directory lists what is live now.