DD and W4 settings persist across sessions (a checkin sees whatever an earlier onboarding wrote). Re-picking the same scenario leaves the W4 untouched; picking a different one updates only its Box 4c withholding lever, keeping any existing Box 3 credit. Reset to start fully clean.
Standard payroll sandbox flow
Onboard here with 0 dependents, then at the checkin pick this again (UNCHANGED), Bigger Boost (INCREASED) or Smaller Boost (DECREASED)
Get a larger boost than normal
Checkin only, after onboarding under Default (Checkin Testing): DECREASED
Under-withheld taxes
Small refund tuned to clear the withholding ceiling for payboost-frontload-target-factor
Only 5 statements
First 2 statements 404
Skip MFA on W4 edit
MFA required when submitting DD changes
Pay statements maintenance
Direct deposit maintenance
W4 edit maintenance
DD edit disabled by HR
W4 edit disabled by HR
W4 submit fails (maintenance)
DD submit fails (maintenance)
DD submit fails (server error)
W4 submit fails (server error)
Pay statements fetch fails (browser task error)