There is no form whose full name is "form 1099". There are several different forms with 1099 in their names, for example:
Form 1099–B, Proceeds From Broker and Barter Exchange Transactions
Form 1099–DIV, Dividends and Distributions
Form 1099–INT, Interest Income
Form 1099–MISC, Miscellaneous Income
Form 1099–OID, Original Issue Discount
Form 1099–R, Distributions from Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
Form SSA–1099, Social Security Benefit Statement
Except for 1099-INT, none of these are for interest.
Generally, you should attach whichever any forms that have names that BEGIN WITH "Form 1099" AND show federal tax withheld, except that you do not have to attach a 1099-G that show federal tax withheld from unemployment compensation. Generally, you do not need to attach any form with a name that begins with "Form 1099" and does NOT show any tax withheld.