Yes. You will need to send proof that the mark is being used in this country.
Acceptable proofs of use could include: a page from a web site, an advertisement, a brochure or a pamphlet which describes the product/service and shows the trademark.
Labels, tags, or packaging are also considered acceptable proof of use for a trademark.
We do encourage you to plan ahead when filing and sending papers and not wait until the last minute.
All forms when received are time/date stamped, according to Eastern Standard Time (EST) and EST controls for purposes of determining the timeliness of a document. Any submission that arrives as of 11:59 p.m. EST will be given that day’s filing date (i.e., regardless of the PTO “normal” business hours).