Sanchy their is no temple in heaven.
A Believer, the literal temple constructed here on Earth by Solomon was a represenation of the great spiritual temple of jehovah's habitat in the spiritual realm. Here's what even WT's Insight book has to say about it under the Cat "Temple":
Jehovah’s Great Spiritual Temple. The tabernacle constructed by Moses and the temples built by Solomon, Zerubbabel, and Herod were only typical, or pictorial. This was shown by the apostle Paul when he wrote that the tabernacle, the basic features of which were included in the later temples, was “a typical representation and a shadow of the heavenly things.” (Heb 8:1-5; see also 1Ki 8:27; Isa 66:1; Ac 7:48; 17:24.) The Christian Greek Scriptures disclose the reality represented by the type. These Scriptures show that the tabernacle and the temples built by Solomon, Zerubbabel, and Herod, along with their features, represented a greater, spiritual temple of Jehovah, “the true tent, which Jehovah put up, and not man.” (Heb 8:2) As revealed by its various features, that spiritual temple is the arrangement for approaching Jehovah in worship on the basis of the propitiatory sacrifice of Jesus Christ.—Heb 9:2-10, 23.
The inspired letter to the Hebrews states that in this spiritual temple the Most Holy is “heaven itself,” the area where the person of God is. (Heb 9:24) Since only the Most Holy is “heaven itself,” then the Holy and the priestly courtyard, as well as their features, must pertain to things on earth, those things having to do with Jesus Christ during his ministry on earth and his followers who are “partakers of the heavenly calling.”—Heb 3:1.
This spiritual temple is the one John refers to in Revelation. The WT tries to go around this point by claiming that the great crowd is serving on the courtyard of the temple, something that is not true, since the term "naos" as used by John only included the most inner holy areas, and thus it can only refer to the location of Jehovah himself, or heaven.