We were rejected from receiving a grant because they said that we are considered a 501(a) organization. If our IRS letter says the following, are we considered a 501(c)(3) public charity or a 501(a) non-profit? If we are considered a 501(a) does that mean that contributions to us are not tax-deductible? “We have determined that you are exempt from federal income tax under section 501(a) of the Internal Revenue Code as an organization described in section 501(c)(3). We have further determined that you are not a private foundation within the meaning of section 509(a) of the Code, because you are an organization described in sections 509(a)(1) and 170(b)(1)(a)(vi)”