Which comes down to earth, in the promised land.
No where does it say we go to heaven
New Jerusalem comes down to this earth after the 1,000 years (Revelation 20). During that mean-time (the 7th and final 1,000 years of this present earth), we, who are believers, do indeed, enter Heaven upon Jesus second advent. John 14:1-3; 1 Thessalonians 4:14,17; etc.
People generally confuse the reigning in Heaven with the reigning on earth. There are two reigns, one leading into the other. The one time-sensitive (1,000 years), and the other without end (for ever).
Allow me to demonstrate from scripture, if you will please:
Those passages (Revelation 20:1-7) speak about a "1000 years" "reign", a "millenium" [latin: "mille":1000 and "annum":years] that shall be with Christ Jesus and His Saints.
Where will this "1000 years" "reign" with Christ Jesus be? Shall it be here upon this Earth? or shall it be elsewhere instead [and if elsewhere, where then, and what of the Earth at that time, and where will Satan and the wicked be during this same period, and what then after the 1000 years]? Let us look to the scriptures for these answers:
There are two "reigns" ["1000 years" and "forever and ever"], one leading into the other:
[1] The "1000 years" reign "in Heaven" [Psalms 50:5; Matthew 5:3,8,10,12, 6:20, 13:30, 24:31; Mark 10:21, 13:27; Luke 6:23, 18:22, 23:43; John 14:2-3, 17:24; Colossians 1:5; Hebrews 10:34; 1 Peter 1:4; Revelation 7:9, 14:3, 19:1; "Paradise", Luke 23:43; 2 Corinthians 12:4; Revelation 2:7] with Christ Jesus [1 Thessalonians 4:16-17; Revelation 20:6] and...
[2] The "reign on earth" ["made new", not this sin polluted Earth; 2 Peter 3:13; Isaiah 65:17, 66:22; Revelation 21:1] that lasts "forever and ever" [Revelation 5:10; "meek inherit earth" ["made new", not this sin polluted Earth], Psalms 37:9,11,34; Proverbs 11:31; Isaiah 25:8, 65:21; Daniel 7:27; Matthew 5:5; Revelation 5:10].
The passages which speak about the "1000 years" "reign" of the Saints with Christ Jesus [Revelation 20:1-7] make absolutely no mention of being "on the earth". The passages which speak about the "reign on the earth" [Revelation 5:10] does not end after a "1000 years", for it is even "forever and ever" [Revelation 11:15, 22:5]. In fact, the passages declare that those Saints reigning with Christ Jesus in the "1000 years" are "in Heaven" before the throne of God on the "sea of glass mingled with fire" [Revelation 4:6, 15:2].
This is a short summation if you will please. I have much more detail on these things as needful.