Immigrationboards.com

Do I need a letter from my employer when applying for naturailsation ?
(I will be including my P60 from 2010-2011, I also have entry visa stamp on 2008)

APPLICATIONS MADE ON THE BASIS OF RESIDENCE IN THE UNITED KINGDOM
Evidence of lawful residence during the 5 (or, if the applicant is married to or in civil
partnership to a British citizen, 3) years before the date of the application
• Your passports OR say why you are unable to provide one on page 13 and supply
• Letters from employers, educational establishments or other Government
Departments indicating the applicant’s presence in the United Kingdom during the
relevant period
If your passport is not stamped when you come into the United Kingdom for example
because you have a right of abode in the United Kingdom or you are a national of the
“Turkish Republic of Northern Cyprus” or Taiwan, you should send your passport and also
provide alternative evidence of residence as above. If you are an EEA national you should
additionally provide the information listed below.

See exact same question - Form AN question.

But someone told me that the employer letter is used for proof that I am a tax payer. He also said that I need to work in a company at least two years.

"someone told you" - don't believe to everything "someone" says.

For naturalisation, there is no need to be in employment or to show you paid tax (if you are not self-employed).

P60 are not required. Why do you think you need them?

You would only need to include employers letters etc if you are in the UK under EEA legislation and havent already received a PR stamp