---
title: Required Filings & Deadlines | doola Help Center
description: Simplify your business taxes with guides on structures, deadlines, and smart tax tips.
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2. [Required Filings & Deadlines](https://help.doola.com/required-filings-deadlines)
# Required Filings & Deadlines
Simplify your business taxes with guides on structures, deadlines, and smart tax tips.
- [How to Properly Dissolve Your Company](https://help.doola.com/how-to-properly-dissolve-your-company)
- [When to File Articles of Incorporation for Your Business](https://help.doola.com/when-to-file-articles-of-incorporation-for-your-business)
- [How to Change or Amend Your Company Name After Incorporation](https://help.doola.com/how-to-change-or-amend-your-company-name-after-incorporation)
## Federal (IRS) Tax
- [What is the K series of tax forms? | doola Help Center](https://help.doola.com/what-is-the-k-series-of-tax-forms-doola-help-center)
- [What is the 1040 Form?](https://help.doola.com/what-is-a-1040-form-used-for)
- [What is a Schedule C form?](https://help.doola.com/what-is-a-schedule-c-form)
- [Who Needs to File a Schedule C?](https://help.doola.com/who-needs-to-file-a-schedule-c)
- [Does doola support personal tax returns (1040) and Schedule C?](https://help.doola.com/does-doola-support-personal-tax-returns-and)
## Sales Tax
- [Sales Tax Filing vs. Annual Tax Filing](https://help.doola.com/sales-tax-filing-vs.-annual-tax-filing)
- [Understanding Sales Tax and Resale Certificates in Wyoming](https://help.doola.com/understanding-sales-tax-and-resale-certificates-in-wyoming)
- [Sales Tax Applicability for Online Services](https://help.doola.com/sales-tax-applicability-for-online-services-doola-help-center)
- [Why are there no sales taxes for wholesalers?](https://help.doola.com/why-are-there-no-sales-taxes-for-wholesalers-doola-help-center)
- [What are my sales tax responsibilities if my company provides SaaS?](https://help.doola.com/what-are-my-sales-tax-responsibilities-if-my-company-provides-saas-doola-help-center)
- [Sales Tax by State: Economic Nexus State Guide!](https://help.doola.com/sales-tax-by-state-economic-nexus-state-guide-doola-help-center)
- [What are the tax responsibilities of a wholesaler? What is a resale certificate?](https://help.doola.com/what-are-the-tax-responsibilities-of-a-wholesaler-what-is-a-resale-certificate-doola-help-center)
- [What sales tax services does doola offer?](https://help.doola.com/what-sales-tax-services-does-doola-offer)
- [What is sales tax registration?](https://help.doola.com/what-is-sales-tax-registration)
- [How do I know if I need to register for sales tax?](https://help.doola.com/how-do-i-know-if-i-need-to-register-for-sales-tax)
- [What is economic nexus, and how does it affect me?](https://help.doola.com/what-is-economic-nexus-and-how-does-it-affect-me)
- [Which states require sales tax registration?](https://help.doola.com/which-states-require-sales-tax-registration)
- [What happens if I don’t register for sales tax when required?](https://help.doola.com/what-happens-if-i-dont-register-for-sales-tax-when-required)
- [How long does sales tax registration take?](https://help.doola.com/how-long-does-sales-tax-registration-take)
- [Do I need a separate registration for each state?](https://help.doola.com/do-i-need-a-separate-registration-for-each-state)
- [How do I register to Sales Tax?](https://help.doola.com/how-do-i-register-to-sales-tax)
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- [Required Filings & Deadlines](https://help.doola.com/required-filings-deadlines#main-content)
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