If you used Turbo Tax your refund will not be mailed until later. Turbo Tax & the banks they used do not have permission to handle these checks from the IRS, nor will they be asked (too many) therefore it will be mailed. I think the first batch of mailings go out this week

00 through 09 May 16
10 through 18 May 23
19 through 25 May 30
26 through 38 June 6
39 through 51 June 13
52 through 63 June 20
64 through 75 June 27
76 through 87 July 4
88 through 99 July 11