You can remove your agent’s authorisation at any time. If you want to change who you’ve authorised, you must remove the current agent before authorising the new agent. Information on form FB12 has been removed because you now only need to use form 64-8 to authorise an agent.

If you have signed up for Making Tax Digital for VAT, this form cannot be used to authorise an agent to manage your Making Tax Digital services. You cannot use this form on its own to set up a Self Assessment account. Find out more about registering for Self Assessment. You can also sign in to your agent services account. How to authorise someone for Tax Credit and Child Benefit Use form TC689 to authorise someone to act on your behalf for Tax Credit and Child Benefit matters. If you want to submit a subject access request So basically, you'll either see the exponent using superscript (to make it smaller and slightly above the base number) or you'll use the caret symbol (

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Use this form to give authorisation for an agent to deal directly with HMRC on your behalf, such as: The 'Authorising your agent (64-8)' iForm has been removed and replaced by the new 'Authorising your agent (64-8)' PDF form. Guidance has been added to help you to complete the form. If you do not have a code, you can find out how to get an agent code in how to register and get authorised as a tax agent to deal with HMRC. Self Assessment Agents can find their Agent Government Gateway identifier (if they have one) by signing into HMRC online services for agents and selecting ‘Authorise client’ from the left-hand menu. The identifier will appear on the next screen under the title ‘Agent identifier’. Employers’ PAYEUnder '5 Where to send this form' in bullet point 3 the words 'or an expatriate' and 'or the Manchester expat team' has been deleted. The Manchester Expat Team no longer deal with 64-8 forms. There are a number of ways this can be expressed and the most common ways you'll see 64 to the 64th shown are:

Agents can find their Agent Government Gateway identifier (if they have one) by signing into HMRC online services for agents and selecting ‘Authorise client’ from the left-hand menu. The identifier will appear on the next screen under the title ‘Agent identifier’. Find more information

Let's get our terms nailed down first and then we can see how to work out what 64 to the 64th power is. So you want to know what 64 to the 64th power is do you? In this article we'll explain exactly how to perform the mathematical operation called "the exponentiation of 64 to the power of 64". That might sound fancy, but we'll explain this with no jargon! Let's do it. What is an Exponentiation? If you’re an agent, you’ll be asked for your 6-digit Self Assessment, PAYE or Corporation Tax agent code. When we talk about exponentiation all we really mean is that we are multiplying a number which we call the base (in this case 64) by itself a certain number of times. The exponent is the number of times to multiply 64 by itself, which in this case is 64 times. 64 to the Power of 64