Nexus1040

Nexus1040 helps people who work across state lines estimate, plan, and document their US state tax exposure before filing season. Users connect payroll/1099 sources and travel/location history (manual or calendar import) to generate a state-by-state “where you worked” ledger, projected resident/nonresident filing needs, and a quarterly withholding/estimated-tax plan. It flags common traps: double-tax risk, reciprocity agreements, part-year residency thresholds, and employer withholding mismatches. The app produces an exportable evidence packet (dates, locations, assumptions) and a plain-English checklist to hand to a CPA. This is not a replacement for a tax pro; it’s a planning and documentation tool to avoid nasty surprises and reduce prep time/cost. It’s realistic because it focuses on one painful niche (multi-state complexity) rather than trying to beat full tax-filing incumbents.