The letter contains a code which identifies the company and is used by HMRC on all dealings with company’s tax. The company’s tax records are all available with HMRC and can be tracked with the help of UTR.
It is a 10 digit code unique to all taxpayers in UK. It is required for all correspondence made with HMRC. It facilitates HMRC to process tax returns in an effective, efficient and accurate manner. It helps to identify the person (i.e., whether it’s a company, partnership, etc.), so that their records can be managed accordingly. It might just be called ‘tax reference’. At many places, it contains of 13 digits which start with “623”(623 is a tax district number). This can be eliminated while quoting just the UTR number.
No, both the UTRs are separate. The one contained in this particular letter helps to recognise company’s data. Since HMRC uses a separate UTR for both matters, for identification purposes, whenever they're dealing with tax situation, it's important to make sure that both of them are kept handy and separate.
We will get a UTR automatically once we incorporate a company. It can also be requested later, if you cannot find one. It can also be the case that your agent/ accountant have requested this with HMRC on your behalf.