Multi-State Resale Certificate Setup

I run a U.S.–based ecommerce company that sells on both Amazon and Walmart marketplaces and rely heavily on dropshipping suppliers. To keep everything compliant and unlock tax-exempt purchasing, I now need a full suite of resale / tax-exemption certificates across the states where those platforms trigger nexus or where my suppliers insist on separate paperwork.

Here is the current snapshot:
• We already hold a resale certificate for New York.
• No other state certificates are in place yet.
• Our sales footprint follows the “major marketplace” pattern, so I need help understanding which additional states truly require stand-alone certificates versus being covered by a multi-jurisdiction form.

What I need from you
1. Review of my nexus profile and marketplace activity to pinpoint every state that requires either a state-issued resale certificate or acceptance of a multi-state certificate (Streamlined Sales Tax, MTC, etc.).
2. Preparation—or step-by-step guidance—of each application, including any registrations that must precede a certificate request.
3. Completion of a properly filled multi-jurisdiction resale certificate for the states that accept it, ready for me to hand to suppliers.
4. Clear instructions on how and when to renew or update each document.

Acceptance criteria
• A spreadsheet or tracker listing every state considered, its nexus rationale, the certificate type used, issue/expiration dates, and status (filed / approved / pending).
• PDF copies (or portal screenshots) of all completed certificates ready for supplier submission.
• A short hand-off call or document summarising next steps and renewal timelines.

If you regularly work with marketplace sellers, dropship models, and tools such as Avalara or TaxJar, that’s a huge plus. Please outline your relevant experience, the estimated time frame to complete the entire set-up, and your fee structure or milestone plan so I can move forward quickly.