Florida DOR is usually for sales tax or possibly child support. Someone may have also given them an old or incorrect number. They are also working from home though I believe it does show up as DOR.
If Form DR-835 is for a reemployment tax matter and the taxpayer has completed Section 4, mail it to the Florida Department of Revenue, P.O. Box 6510, Tallahassee FL 32314-6510, or fax it to 850-488-5997.
A letter from the Florida Department of Revenue may be a sales and use tax audit, audit for another tax type, or a non-audit communication requiring your urgent attention. The best time to consult an attorney is right when you receive one of these communications, when there is still time to act.
Paper filers may Telefile Zero Returns: If you file a paper return, have zero tax due, and are not claiming any deductions or credits, you may telefile by calling 800-550-6713. Telefile is available 24 hours a day, seven days a week and when you telefile, you do not need to mail your paper return.
An agency that is accessible and responsive to citizens, provides fair and efficient tax and child support administration, and achieves the highest levels of voluntary compliance.
Using your tax account information, you may download and print your certificate. Go to floridarevenue, select “more e-Services” and then select “Print an Annual Resale Certificate.” If you need assistance, contact Taxpayer Services at 850-488-6800.
Applicants have two options, which are to file the application online or download the forms, fill them out, and submit them by mail or in person. If you choose to submit the forms using the latter options, you can do it through a taxpayer service center or submit them directly to the Department of Revenue.