Cover - shares	9 Months Ended
	Jun. 30, 2024	Aug. 29, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2024
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--09-30
Entity File Number	000-56293
Entity Registrant Name	CORETAG, INC.
Entity Central Index Key	0001624140
Entity Tax Identification Number	35-2515740
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	7325 Oswego Road
Entity Address, City or Town	Liverpool
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	13090
City Area Code	(315)
Local Phone Number	451-7515
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	true
Entity Common Stock, Shares Outstanding		93,300