Annual Reports:

Online MO Annual Report (s-corp): https://www.sos.mo.gov/BusinessEntity/annualreport/reportstart.asp

Online KS Annual Report:
http://www.kssos.org/other/ar_forms.html

Federal 941 Quarterly Report:

Lost your 941 quarterly wage report, use the generic at:
http://www.irs.gov/pub/irs-pdf/f941.pdf

Monthly/Quarterly, etc. State Withholding:

Lost your MO941 withholding coupon book, use the generic at: http://www.dor.mo.gov/tax/business/withhold/forms/2006/941fi.pdf

Lost your KW-5 withholding coupon book, use the generic at: http://www.ksrevenue.org/pdf/forms/kw5.pdf

Sales Tax Reports:

Lost your Missouri sales tax return, use the generic at:
http://www.dor.mo.gov/tax/forms/

Lost your Kansas retailer's sales tax return, use the generic at: http://www.ksrevenue.org/forms-btsales.htm

Registering Your Business (or adding a tax):

Need to register your Kansas business or add a tax:
http://www.ksrevenue.org/forms-btreg.htm

Need to register your Missouri business or add a tax:
http://www.dor.mo.gov/tax/forms/

Moved or Changing the Registered Agent's Address:

Change your Kansas registered agent's address (which is usually your own address): http://www.kssos.org/forms/business_services/RO.pdf

Change your Missouri registered agent's address (which is usually your own address): http://www.sos.mo.gov/forms/corp/corp59.pdf

For General IRS (Federal) Info/Forms:
http://www.irs.gov